<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM FORM 8-K AND
IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<RESTATED> 
<MULTIPLIER> 1,000
       
                                                                                            
<PERIOD-TYPE>                   3-MOS                   6-MOS                   9-MOS                   12-MOS
<FISCAL-YEAR-END>                          DEC-31-1996             DEC-31-1996             DEC-31-1996             DEC-31-1996
<PERIOD-START>                             JAN-01-1996             JAN-01-1996             JAN-01-1996             JAN-01-1996
<PERIOD-END>                               MAR-31-1996             JUN-30-1996             SEP-30-1996             DEC-31-1996
<CASH>                                           3,697                   5,569                   5,339                   2,774
<SECURITIES>                                         0                       0                       0                       0
<RECEIVABLES>                                   47,828                  50,136                  48,635                  72,664
<ALLOWANCES>                                         0                       0                       0                       0
<INVENTORY>                                          0                       0                       0                       0
<CURRENT-ASSETS>                                61,656                  64,945                  67,510                  84,690
<PP&E>                                         775,652                 801,059                 833,402                 935,172
<DEPRECIATION>                                 220,426                 236,776                 253,691                 271,147
<TOTAL-ASSETS>                                 627,081                 639,689                 657,977                 766,816
<CURRENT-LIABILITIES>                           60,574                  62,258                  62,644                 113,376
<BONDS>                                        321,541                 323,752                 336,380                 372,390
<PREFERRED-MANDATORY>                                0                       0                       0                       0
<PREFERRED>                                          0                       0                       0                       0
<COMMON>                                           240                     240                     240                     241
<OTHER-SE>                                     210,588                 218,299                 224,642                 236,165
<TOTAL-LIABILITY-AND-EQUITY>                   627,081                 639,689                 657,977                 766,816
<SALES>                                         70,876                 146,859                 222,676                 310,796
<TOTAL-REVENUES>                                71,340                 147,383                 223,335                 312,147
<CGS>                                           34,136                  68,607                 106,824                 148,630
<TOTAL-COSTS>                                   34,136                  68,607                 106,824                 148,630
<OTHER-EXPENSES>                                21,426                  43,695                  66,084                  89,763
<LOSS-PROVISION>                                     0                       0                       0                       0
<INTEREST-EXPENSE>                               7,319                  14,737                  22,467                  30,109
<INCOME-PRETAX>                                  8,459                  20,343                  27,960                  43,645
<INCOME-TAX>                                     2,352                   6,080                   6,476                   9,975
<INCOME-CONTINUING>                              6,105                  14,077                  21,142                  33,188
<DISCONTINUED>                                       0                       0                       0                       0
<EXTRAORDINARY>                                      0                       0                       0                       0
<CHANGES>                                            0                       0                       0                       0
<NET-INCOME>                                     6,105                  14,077                  21,142                  33,188
<EPS-PRIMARY>                                      .13                     .29                     .44                     .69
<EPS-DILUTED>                                      .13                     .29                     .43                     .68